Oil-burner.



J. L. HOFFMAN.

OIL BURNER.

APPLIOATION FILED 11110.21, 1912.

Patented Feb.17,1914.

"j et l To all whom 'it may concern."

UiSnTEDA STATES PATENT oFFIcE.

JosEPH L. HOFFMAN, or PORTLAND, OREGON..

OIL-BURNER.

Specification of Letters Patent.

Application tiled December 21, 1912. Serial N o. 738,000.

Be it known that I, JOSEPH L. HOFFMAN, a citizen of the United States, residing in the cityof Portland, county of Multnomah, and State of Oregon, havinglinventedf certain new and useful Improvements in Oili .V Burners, do hereby declare the following to be a full, clear, and exactdescription of one embodiment of the same.

My invention relates to oil burners and has among its salient objects to provide an improved land simplified oil burner of few parts and'of such construction and arrangement that a more thoroughmixing and atomizing of the fuel is obtainable, and therefore a more nearly perfect and complete combustion had; toprovide in combination with an oil burner a controlling and regulating tip or element at the discharge end of the burner which is capable of being manipulated and adjusted at any time from outside of the furnace-or fire box within which the burner is used, thereby making it possible to adjust the tip and change the iiame at will While in use.

Other objects will appear from the following description of one practical embodiment of the invention, reference being had to the accompanying sheet of drawings illustrating the same, and in which,

Figure 'l is a longitudinal sectional view of one embodiment of the invention; Fig. f2 is a cross sectional View taken on line 2 2 of Fig. I; Fig. 3 is a cross sectional view taken on line 3 3, Fig. l; Fig. 4 isan outer end View of the burner; Fig. 5 is a side land 2 discharge. structed, as shown in Fig. l, to receive the elevation of a burner with connections; Fig. G' is a ysectional View of a modified form of mixing member; Fig. 7 is a side elevation of one form of tip or cap used on the outer or discharge.l end of the burner; and Fig. 8 is another form of cap or tip for the discharge.

Referring now to the drawings, 1 designates a steam supply pipe, 2 an oil supply pipe,and 3 a member formed as a part of a casing` orburner body et into which plpes l The member 3 is conend fof the steam supply pipe, as indicated,

and also the end of the oil supply pipe 2, at

'i fajfpoint interiorly thereof, as indicated,

A,whereby to provide a chamber 5 into which Q the` steam is lfirst dischargedL from the, pipe smLLVit-hinthe' burner casing is a mixing 1 provided withf'a series of passageway/sl ber, which I' will designateas 3', which in casing jl, which is screwed on to the member 3, as mdicated in Fig. l. The member 3 and the casing 4 together. form, in effect, one .general burner casing or body, with the mixing member 3 interposed therein as a partition and made of sufficient length so that the passageways therethrough will give definite direction to the fuel forced therethrough. These passageways are preferably made spiral, as indicated by the dotted curved lines passageways 7 7 being spiraledin a different direction from that of passageways 9 9, the effect being similar to the riding in the barrel of a rifle, and adding increased mixing and atomizing force-as the oil and steam collide at angles in chamber 8 under this forced torsional movement, from the smaller or restricted discharge ends of said passageways, for with the larger or receiving ends leading from the oil and steam supplies, and the smaller or discharging ends opening into chamber 8, ll am able to get an increased pressure in the discharge, while l have a comparatively low pressure feed of oil and steam. This is an import-ant feature and secures a most remarkable commingling and atomizing of the steam and oil, and a more nearly perfect combustion. The mixing member 3', in the form here shown,is also provided with a threaded stem l0, extended within chamber 8, and is adaptedto receive a conical tip or element 1l, adjustably mounted thereupon and constructed to form and regulate an lannular opening 12 from the mixing cham- 4'end with an operating hand Wheel 14, Fig.

5, whereby said tip can be turned on the stem `10 in the mouth of the case 4, .from a rearward position at will, without putting out the tire, for lthe purpose of regulating the size of the annular discharge opening I producing a flat flame. The ti Fig 8 is in the form of caps or tips, the

yvide a bushing l2 and the amount of the mixture discharged therethrough for combustion. The conical tip 11- is provided in its outer face with an annular groove 11 for the purpose of preventing oil from the discharge vopening from runnin down on tothe face of said tip 11 and t ere carbonizing, the edge of the conical tip adjacent the annular opening 12. beinv thereb maderather sharp.

n Fig. GDI have s owna slightly modified form of mixing member 3, showing it as a separate member adapted yto be inserted into the case 4 and against .a shoulder llztherein, while the part 3 would be screwed against it. By this construction the mixin member can be removed and interchange of varying constructionw In this form I have shown the passageways straight instead of spiral, although tapered. .A

The outer end of the burner casing 4 is reduced and threaded, as at 15, to receive any desired form of discharge nozzle or tip for shaping the flame, such, ,for example, as those shown in'Figs. 7 and 8, the tip shown in Fig. 7 comprising a unionl 16, adapted to be screwed 4to, the casing 4,.and to receive tip 17 having a slot opening 18 therein for shown in a cap a apted to be screwed upon the caseA 4- andis provided with a series of holes, as indicated in dotted lines vat 18'.. Such tips .or caps upon the outer end of the burner case may be used when it is desired to shape the flame and to adapt the burner for different uses.- l the burner is used without the detachable flame is of daring form around the regulatingtip 11, which regulates the amount of the combustible mixture permitted to pass through the burner.

Referring'to Fig. 5, I connect the steam pipes 1--1 to an ordinary T, 19 and proto receive a smaller pipe 2, for the oil, as indicated in dotted lines. By extending the steam and oil pipes, one withinfthe other, for a short distance, as shown in Fig. '5, before attaching the burner proper,l the steam in thesteam pipe heats the oil passing through the oil supply pipe,

thus putting it in the best possible condition for atomizing with the steam as the two intersect each other, under pressure, at angles, in chamber 8.

` An important feature of improvement is a construction whereby I am able to closel the oil supply valve so as to shut off the oil, then close the adjustable tip 11 inwardly so as to close the outlet from the chamber 8, and then by opening an outlet or exhaust valve 20, steam can be forced through the steam pipe 1, into the burner,

through 'the passageways 7 .into chamber 8.

and thence back through the openings or passageways 9, through the oil supply pipe and out through valve 20, thereby making for another When.

it possible to blow all sediment or other obvalves mentioned. I have also indicated inv dotted l lines, certain` spirally extending grooves cut 1n the conical tip 11. These terminate short of the outer edge thereof .and serve not only to give a spiral direction to the matter striking in them, but to catch in their enlarged-outer ends any solid matters which might interfere with the discharge of the fuel through the annular opening-12.

From the foregoing, it will be seen that I have, in the first place, an extremely simple burner, a burner ofvery few parts, a burner which can be easily taken apart and new parts substituted, and also a burner provided with a regulatin tip at its discharge end adapted to be a justed from outside of tie lire box, at any and all times, for the purpose of reducing or increasing the amount of the combustible mixture to be discharged from the burner, and thereby making it possible to regulate the flame at will during ,the time 4in which the burner is in actual use, and also which can be adjusted to closecthe discharge outlet.l so as to make it possible, vhaving closed or cut oif the oil supply and opened an exhaust valve, to force steam through the burner and oil supply pipe for the purpose of cleansing the same eiectively and quickly. The regulation of the discharge of the combustible matter from the burner, is 'separate and apart from the means for regulating the admission of steam, or of oil, into the burner.

While I have shown and described one embodiment of the invention, I amaware that modifications can be made therein without departing from the spirit thereof, and I do not, therefore, limit the invention to the particular showing here made for purposes of illustration, but claim broadly all constructions covered by the hereto appended claims, broadly construed.

.I claim:

1. 1n an oil burner, in combination, a burner body, a mixing member mounted therein and provided with tapering passageways extending longitudinally therethrough and angularly disposed relative to each other, whereby t'o :discharge vi-n intersecting paths, a regulating element adjustably mounted at the discharcfe end of said burnerbody to control the size of the discharge opening, and an operating rod from said regulating element and extended rearwardly for manipulation of said regulating element during the operation of the burner.

2. An oil burner comprising in combination, supply pipes arranged one Within the other, a burner casing mounted upon the ends of said supply pipes, a discharging or miXin member mounted in said casin interme iate its ends and having t erethrough, extending longitudinally thereof, two series of passageways diverging and converging respectively, whereby to discharge in intersecting paths, a regulating member in the outer end of said burner casing, and an operating rod from said re ulating member and extendin rearwar ly through said burner casing an supply pipes to a convenient point for manipulation.

3. ln an oil burner of the character re.- ferred to, in combination, a burner body, a member mounted therein and having therethrough, longitudinalll thereof, a series of passageways for com ustible matter, and provided with a stem extension to the end of the burner body, a regulating member in the outer end of said burner body and adjustably mounted upon said stem extension, and an operating rod for said regulating member extending rearwardly through said stem extension and burner body, substantially as described.

4. ln an oil burner, in combination, a

ZO burner body with a chamber therein, a mix- 5. In an oil burner, a burner body, a mixing member mounted therein and provided with passageways extending longitudinally therethrou h and angularly disposed relative to eac other, whereby to discharge in intersecting paths, a regulating element adjustably mounted in the discharge opening of said burner body to control the size of said opening, and an operating rod from said regulating element and extended rearwardly 'for manipulation of said element during the operation of the burner.

In Witness whereof, I have hereunto set my hand at Portland, Multnomah. county, Oregon, this 14th day of December, 1912.

JOSEPH L. HOFFMAN.

ln presence of.-

G. A. NICHOLS, A. G. Fnos'r. 

